3v4l.org

run code in 300+ PHP versions simultaneously
<?php if (!function_exists('json_encode')) { function json_encode($it) { if (!($assoc = is_object($it)) && !is_array($it)) { return _js_enc_value($it); } $i = 0; $it = (array)$it; if (!$assoc) { foreach ($it as $k => $v) { if ($k !== $i) { $assoc = true; break; } $i++; } } $data = array(); foreach ($it as $k => $v) { $v = _js_enc_value($v); if ($assoc) { $k = _js_enc_value($k); $data[] = $k . ':' . $v; } else { $data[] = $v; } } if ($assoc) { $bl = '{'; $br = '}'; } else { $bl = '['; $br = ']'; } return $bl . implode(',', $data) . $br; } function _js_enc_value($value) { switch (true) { case is_array($value): case is_object($value): return json_encode($value); case is_bool($value): return $value ? 'true' : 'false'; case $value === null: case is_resource($value) && _js_error(): return 'null'; case is_string($value): return '"' . _js_uc_esc($value) . '"'; default: return $value; } } function _js_error() { return trigger_error( 'json_encode(): type is unsupported, encoded as null', E_USER_WARNING ); } function _js_uc_esc($value) { $pattern = "@[\r\n\"'/]|([^\x09\x0A\x0D\x20-\x7E]{3})+@"; return preg_replace_callback($pattern, '_js_uc_esc_cb', $value); } function _js_uc_esc_cb($matches) { switch (true) { case isset($matches[1]): $char = mb_convert_encoding($matches[0], 'UTF-16', 'UTF-8'); $str = ''; $len = strlen($char); for ($i = 0; $i < $len; $i += 2) { $str .= sprintf('\\u%02x%02x', ord($char[$i]), ord($char[$i + 1]) ); } return $str; default: return addcslashes($matches[0], "\r\n\"'/"); } } } $var = array( array( 'text', 1, 1.1, true, false, null, array(), new stdClass, @fopen('php://stdin', 'r'), ), array( 'あ' => "\\/\"'&#\r\n\s\t\a\v\e\z", ), array( '0' => 'hoge', '1' => 'foo', ), (object)array( '0' => 'hoge', '1' => 'foo', ), array( '0' => 'hoge', '2' => 'foo', ), (object)array( '0' => 'hoge', '2' => 'foo', ), ); var_dump(json_encode($var));

Here you find the average performance (time & memory) of each version. A grayed out version indicates it didn't complete successfully (based on exit-code).

VersionSystem time (s)User time (s)Memory (MiB)
8.3.60.0140.00718.43
8.3.50.0090.00721.97
8.3.40.0000.01718.76
8.3.30.0090.00619.05
8.3.20.0000.00820.34
8.3.10.0000.00821.96
8.3.00.0050.00322.43
8.2.180.0140.00416.75
8.2.170.0170.00322.96
8.2.160.0110.00720.93
8.2.150.0040.00424.18
8.2.140.0090.00024.66
8.2.130.0040.00426.16
8.2.120.0060.00319.36
8.2.110.0070.00320.51
8.2.100.0000.01217.78
8.2.90.0030.00519.29
8.2.80.0040.00417.97
8.2.70.0040.00417.63
8.2.60.0000.00717.93
8.2.50.0030.00618.07
8.2.40.0040.00418.16
8.2.30.0040.00418.19
8.2.20.0040.00417.82
8.2.10.0000.00919.47
8.2.00.0040.00417.73
8.1.280.0090.00625.92
8.1.270.0070.00023.71
8.1.260.0080.00026.35
8.1.250.0080.00028.09
8.1.240.0000.00923.86
8.1.230.0080.00323.91
8.1.220.0030.00617.74
8.1.210.0000.00818.77
8.1.200.0070.00317.35
8.1.190.0040.00417.65
8.1.180.0000.00818.10
8.1.170.0030.00618.61
8.1.160.0040.00422.08
8.1.150.0030.00718.63
8.1.140.0040.00417.43
8.1.130.0000.00717.95
8.1.120.0000.00717.43
8.1.110.0040.00817.57
8.1.100.0080.00017.51
8.1.90.0050.00317.62
8.1.80.0050.00317.53
8.1.70.0030.00317.42
8.1.60.0030.00617.64
8.1.50.0000.00817.45
8.1.40.0030.00517.52
8.1.30.0040.00417.66
8.1.20.0030.00617.63
8.1.10.0040.00417.68
8.1.00.0040.00417.56
8.0.300.0070.00018.77
8.0.290.0070.00017.30
8.0.280.0040.00418.64
8.0.270.0030.00317.38
8.0.260.0030.00316.89
8.0.250.0020.00517.11
8.0.240.0000.00817.11
8.0.230.0080.00017.12
8.0.220.0030.00317.04
8.0.210.0070.00016.95
8.0.200.0000.00617.12
8.0.190.0020.00517.01
8.0.180.0070.00017.13
8.0.170.0030.00517.07
8.0.160.0050.00217.14
8.0.150.0040.00416.98
8.0.140.0000.00716.95
8.0.130.0000.00613.53
8.0.120.0040.00417.01
8.0.110.0080.00017.11
8.0.100.0000.00816.96
8.0.90.0040.00416.95
8.0.80.0070.01017.14
8.0.70.0050.00216.93
8.0.60.0000.00917.11
8.0.50.0000.00817.12
8.0.30.0100.01017.11
8.0.20.0090.00917.40
8.0.10.0080.00017.18
8.0.00.0080.01316.80
7.4.330.0030.00315.01
7.4.320.0000.00616.66
7.4.300.0000.00616.58
7.4.290.0000.00716.73
7.4.280.0070.00016.70
7.4.270.0040.00416.66
7.4.260.0030.00316.64
7.4.250.0080.00016.61
7.4.240.0060.00216.54
7.4.230.0000.00716.66
7.4.220.0090.00916.52
7.4.210.0120.00616.68
7.4.200.0080.00016.51
7.4.190.0040.00416.79
7.4.160.0090.00916.49
7.4.150.0060.01217.40
7.4.140.0160.00517.86
7.4.130.0070.01516.60
7.4.120.0160.00516.61
7.4.110.0130.00616.30
7.4.100.0090.01516.55
7.4.90.0130.00316.63
7.4.80.0090.01016.32
7.4.70.0070.01016.62
7.4.60.0140.00416.51
7.4.50.0030.00316.48
7.4.40.0120.00322.77
7.4.30.0100.00716.75
7.4.00.0070.01115.09
7.3.330.0000.00613.44
7.3.320.0030.00613.29
7.3.310.0050.00316.38
7.3.300.0000.00716.29
7.3.290.0110.00816.43
7.3.280.0080.00716.46
7.3.270.0030.01317.40
7.3.260.0110.00616.62
7.3.250.0150.00516.51
7.3.240.0140.00316.36
7.3.230.0150.00316.60
7.3.210.0150.00316.38
7.3.200.0070.01119.39
7.3.190.0090.01316.38
7.3.180.0050.01416.26
7.3.170.0110.00516.42
7.3.160.0130.00316.43
7.3.120.0030.01315.06
7.2.330.0140.01016.77
7.2.320.0090.00916.55
7.2.310.0100.00716.50
7.2.300.0160.00016.69
7.2.290.0170.00316.42
7.2.60.0070.01016.87
7.2.00.0060.00619.55
7.1.200.0030.01015.72
7.1.100.0060.00617.70
7.1.70.0040.00717.18
7.1.60.0100.01419.82
7.1.50.0030.00916.73
7.1.00.0030.09022.44
7.0.200.0040.00416.84
7.0.140.0030.07322.15
7.0.90.0100.07719.91
7.0.80.0100.08319.98
7.0.70.0100.07320.00
7.0.60.0100.05319.98
7.0.50.0100.05320.38
7.0.40.0030.07719.95
7.0.30.0170.07320.08
7.0.20.0070.08020.08
7.0.10.0130.07720.09
7.0.00.0130.07720.17
5.6.280.0070.07021.11
5.6.240.0200.07020.62
5.6.230.0200.06320.59
5.6.220.0100.08320.60
5.6.210.0070.05020.76
5.6.200.0200.06721.07
5.6.190.0100.05021.15
5.6.180.0030.05320.99
5.6.170.0070.06321.10
5.6.160.0100.08021.15
5.6.150.0100.07321.07
5.6.140.0070.05021.04
5.6.130.0070.08021.05
5.6.120.0100.06321.03
5.6.110.0070.07021.03
5.6.100.0100.03321.08
5.6.90.0130.06721.07
5.6.80.0070.03720.47
5.6.70.0070.04020.47
5.6.60.0070.03720.38
5.6.50.0000.04320.45
5.6.40.0000.04320.46
5.6.30.0030.04020.40
5.6.20.0030.04020.40
5.6.10.0070.03720.43
5.6.00.0030.04020.38
5.5.380.0170.06720.36
5.5.370.0170.07320.42
5.5.360.0070.05320.34
5.5.350.0000.06720.48
5.5.340.0130.08020.66
5.5.330.0100.07320.91
5.5.320.0070.08720.91
5.5.310.0130.07320.90
5.5.300.0030.04320.82
5.5.290.0030.05020.93
5.5.280.0070.04020.80
5.5.270.0130.03720.89
5.5.260.0100.03720.84
5.5.250.0100.04720.65
5.5.240.0100.03320.20
5.5.230.0030.08720.18
5.5.220.0100.03320.15
5.5.210.0070.03720.22
5.5.200.0030.03320.20
5.5.190.0000.04720.20
5.5.180.0030.04020.01
5.5.160.0070.03320.20
5.5.150.0070.03720.25
5.5.140.0070.03020.19
5.5.130.0070.03720.29
5.5.120.0000.04720.20
5.5.110.0030.03720.14
5.5.100.0100.03720.07
5.5.90.0070.03319.96
5.5.80.0100.03320.06
5.5.70.0070.06020.10
5.5.60.0070.03720.12
5.5.50.0030.04020.09
5.5.40.0130.03019.95
5.5.30.0000.04319.97
5.5.20.0100.03020.11
5.5.10.0130.03020.07
5.5.00.0070.07320.05
5.4.450.0030.05319.37
5.4.440.0130.04019.36
5.4.430.0100.03319.36
5.4.420.0070.03319.35
5.4.410.0030.04719.34
5.4.400.0000.04019.05
5.4.390.0000.04019.21
5.4.380.0030.03718.87
5.4.370.0030.03718.94
5.4.360.0070.03719.23
5.4.350.0070.03719.02
5.4.340.0030.03718.92
5.4.320.0070.04719.09
5.4.310.0030.04019.21
5.4.300.0000.03719.04
5.4.290.0070.03319.20
5.4.280.0070.03719.12
5.4.270.0000.04319.12
5.4.260.0030.06019.12
5.4.250.0030.03719.04
5.4.240.0070.05318.86
5.4.230.0070.05019.17
5.4.220.0030.05019.12
5.4.210.0030.04019.03
5.4.200.0070.05719.18
5.4.190.0000.04019.11
5.4.180.0100.03718.89
5.4.170.0070.06719.03
5.4.160.0070.07719.07
5.4.150.0130.06319.03
5.4.140.0030.06016.45
5.4.130.0070.04316.43
5.4.120.0130.06716.45
5.4.110.0070.07316.44
5.4.100.0130.07316.39
5.4.90.0100.07016.56
5.4.80.0100.06316.52
5.4.70.0000.07716.55
5.4.60.0130.06316.48
5.4.50.0030.07716.45
5.4.40.0100.07016.52
5.4.30.0070.07016.43
5.4.20.0100.06016.45
5.4.10.0070.06716.31
5.4.00.0100.06715.74
5.3.290.0070.03314.63
5.3.280.0030.06014.66
5.3.270.0070.05314.67
5.3.260.0030.07714.74
5.3.250.0130.07314.74
5.3.240.0130.06714.70
5.3.230.0070.07314.69
5.3.220.0070.05314.70
5.3.210.0030.05314.65
5.3.200.0070.07314.57
5.3.190.0100.05314.52
5.3.180.0100.07714.56
5.3.170.0100.07714.56
5.3.160.0030.05714.58
5.3.150.0030.06314.66
5.3.140.0070.05714.51
5.3.130.0100.06714.71
5.3.120.0130.04714.64
5.3.110.0030.04314.53
5.3.100.0030.06314.20
5.3.90.0030.07714.09
5.3.80.0030.07314.11
5.3.70.0000.04313.97
5.3.60.0000.08013.96
5.3.50.0170.03713.99
5.3.40.0100.07313.97
5.3.30.0030.06714.07
5.3.20.0070.04313.65
5.3.10.0070.04013.59
5.3.00.0000.04713.56
5.2.170.0030.06311.20
5.2.160.0000.06711.07
5.2.150.0070.03711.32
5.2.140.0030.06011.04
5.2.130.0000.06311.25
5.2.120.0030.04011.25
5.2.110.0070.05711.02
5.2.100.0030.06011.02
5.2.90.0070.05711.16
5.2.80.0000.04311.03
5.2.70.0070.06011.04
5.2.60.0030.05711.08
5.2.50.0100.06010.98
5.2.40.0030.06010.95
5.2.30.0070.06310.92
5.2.20.0000.06310.98
5.2.10.0070.04710.92
5.2.00.0100.05010.77
5.1.60.0030.05010.14
5.1.50.0070.04710.13
5.1.40.0070.04710.02
5.1.30.0070.05010.28
5.1.20.0070.05710.46
5.1.10.0000.0579.95
5.1.00.0130.04710.22
5.0.50.0030.0338.67
5.0.40.0030.0438.54
5.0.30.0100.0408.37
5.0.20.0030.0438.10
5.0.10.0030.0408.30
5.0.00.0030.0678.11
4.4.90.0070.0307.20
4.4.80.0170.0237.20
4.4.70.0070.0337.20
4.4.60.0030.0237.20
4.4.50.0100.0237.20
4.4.40.0030.0537.20
4.4.30.0070.0337.20
4.4.20.0000.0307.20
4.4.10.0070.0277.20
4.4.00.0000.0377.20
4.3.110.0030.0337.20
4.3.100.0000.0377.20
4.3.90.0070.0307.20
4.3.80.0030.0507.20
4.3.70.0030.0337.20
4.3.60.0030.0237.20
4.3.50.0030.0337.20
4.3.40.0000.0407.20
4.3.30.0070.0277.20
4.3.20.0000.0207.20
4.3.10.0000.0407.20
4.3.00.0030.0177.20

preferences:
57.22 ms | 401 KiB | 5 Q